I am parsing below sample file in below code snippet.
{"requestType":"INVOCATION", "hostName":"localhost", "serviceName":"bucky", "serviceType":"DISCRETE", "serviceParameters":"sampleData", "servicesList" :[ { "serviceName" : "ABC", "serviceParameters" : {"para1" : "value1", "para2" : "value2", "para3" : "value3"} }, {"serviceName" : "CBA", "serviceParameters" : { "para1" : "value90", "para2" : "value", "para3" : "value"} } ], "dataTransferMode":null }
code snippet:
#include <boost/property_tree/ptree.hpp>
#include <boost/property_tree/json_parser.hpp>
#include <sstream>
#include <iostream>
#include <boost/foreach.hpp>
#include <map>
using boost::property_tree::ptree;
using namespace std;
void print(boost::property_tree::ptree const& pt,vector <string> &service_list, map <string,string> &service_param)
{
using boost::property_tree::ptree;
ptree::const_iterator end = pt.end();
string value;
for (ptree::const_iterator it = pt.begin(); it != end; ++it) {
//cout<<it->first<<":"<<it->second.get_value<std::string>()<<endl;
if(it->first == "serviceName")
{
value = it->second.get_value<std::string>();
service_list.push_back(it->second.get_value<std::string>());
}
if(it->first == "para1")
{
service_param[it->first]=it->second.get_value<std::string>();
}
if(it->first == "para2" )
{
service_param [it->first]=it->second.get_value<std::string>();
}
if(it->first == "para3" )
{
service_param [it->first]=it->second.get_value<std::string>();
}
print(it->second,service_list,service_param);
}
}
int main() {
vector <string> service_list;
map <string,string> service_param_rgbd;
map <string,map<string,string>> map_name;
std::ifstream file( "sample" );
std::stringstream ss;
if ( file )
{
ss << file.rdbuf();
cout<<"done";
file.close();
}
boost::property_tree::ptree pt;
boost::property_tree::read_json(ss, pt);
try
{
BOOST_FOREACH(boost::property_tree::ptree::value_type &v, pt.get_child("servicesList"))
{
assert(v.first.empty()); // array elements have no names
print(v.second,service_list,service_param_rgbd);
}
for(auto itr: service_list )
{
cout<<itr<<endl;
}
for(auto itr: service_param_rgbd )
{
if(find(service_list.begin(),service_list.end(),"ABC")!=service_list.end())
{
map_name["ABC"][itr.first]=itr.second;
}
}
for(auto &i : map_name)
{
for(auto &j:i.second)
{
cout<<j.first <<":"<<j.second<<endl;
}
}
return EXIT_SUCCESS;
}
catch (std::exception const& e)
{
std::cerr << e.what() << std::endl;
}
return EXIT_FAILURE
}In above code i need to populate vector and map in order to have mapping between service name and service parameter and for the same map > map_name needs to be created.
so in current scenario inside loop itself i want to create the nested map so that i will have mapping of service name and corresponding parameters . As per below code snippet here in outer loop i->first will iterate the service name and inner loop will provide me corresponding parameters (para1=>value1,para2=>value2) . This way both service name and corresponding parameters can be tied in one map.
for(auto &i : map_name) {
for(auto &j:i.second)
{
cout<<j.first <<":"<<j.second<<endl;
}
}Can anybody let me know the efficient approach for the same as in this approach :
(a) Separate nested map needs to be created for each of the services. (b) same param name for both services name will not work and different-2 services with same param name can't be differentiated.
